Spring handle for drifting drills



Dec. 1, 1931. A. H. KATTERJOHN 1,334,714

SPRING HANDLE FOR DRIFTING DRILLS Filed Sept. 50, 1926 2 Sheets-Sheet '1 r l I 5 11 .Wj/f I Patented Dec. 1, 1931 p'UNIT ED STATE-s PATENT" OFFICE A G ST iK'AT'rEnJoHN, or DENVER, COLORADO, ASSIGNOR 'rornn DENVE noox DRILL MANUFACTURING COMPANY, or nnnvnn, COLORADO, A CORPORATION or I DELAWARE Application filed September 30, 1926. Serial No. 138,778.

As is well known it isthe custom to mount a drifting drill 'ona shell and to feed it to its work by means of a screw. For these purposes the barrel ofthetool is usually pro- I vided' with oppositely outstanding guide flanges that are slidably engaged in guideways of the shell. Between these flanges is formed a boss or sleeve inwhich is secured the nut that is engaged by-thefeed screw.

The object of the present invention is to provide a handle structure that may be mounted on a tool'ofthis character when the latteris removed from the shell, thus making "the drill adaptable formoregeneral use; A further object is to provide a yielding mounting for such handle.

In the accompanying drawings Figure 1 is a side elevation of a well known type of drift- I ing drill showing the handle attachment in place thereon.

Figure 2 is a longitudinal sectional view of the same. 1

s Figure: 3 is a horizontal sectional view taken substantially on the line 33 of Figure 2. I

" Figure 4 is an end elevation of the handle attachment viewed in the direction of the arrow 4 of Figure 3. i

V 4 Figure 5 is a cross'sectional view through. the barrel with the barrel and handle and is taken on the line 5-5 of Figure 2.

In the embodiment disclosed the barrel of the drifting drill is shown at 6 and may be of any well known'construction. It is provided on its lower side with'an enlargement having oppositely outstanding longitudinally disposed guide fiange's7. These flanges as is well known are adapted to slidably engage in The enlargement is Y.

srnrne HANDLE Fort narrat ve nnILLs the latter has been disassociat-ed from itsshell i and feeding means.

A handle frameor cradle is provided con sisting of spaced side arms 9, across the rear ends of which extends a bolt carrying a. plurality of handle grips 11, one of these grips being preferably located between the arms, the other two extending transversely beyond the outer sidesof said arms. The

front end portions of the arms are provided.

in their inner sides with longitudinal grooves 12, constituting guideways that receive the guide flanges 7 of the tool 6 so that the handle frame and handle will slide upon. the tool.

The front ends of the side arms 9 are con-i nected by a downwardly curved cross how 13; Extending forwardly from thecentral portion of this cross bow is a longitudinally disposed arm v14 te'rminatingin. an upstanding ear 15. The front end of a plunger rod 16 is fixed in this ear by means of a screw thread and held securely with a spring lock washer and nut, said plunger rod extending centrally between the handle arms 9 in a lower plane than the guideways 12. Surrounding the plunger rod is a sleeve 17 in which said plunger rod is slidably mounted. Aplunger'head 18 is fixed to the rear end of the plungerr'od 16 andis slidably mounted in the rear end ofthe sleeve 17. Surrounding the rod 16 between theplunger head 18 and an abutment shoulder 19 formed in the front end of the sleeve 17, is a coiled spring 20; which obviously resists the forward movement of the plunger head and consequently of the plunger rod with respect to the sleeve 17.1 The rear end of the sleeve 17 is of a size to fit snugly in the bossor sleeve 8of the tool barrel 6 and said sleeve 17 is provided with an abutment enlargement 21 that is adapted to bear against the front end of the sleeve or boss 8. This abutment enlarge- .ment is preferably angular to receivea wrench: The rear end of the sleeve 17 is externally threaded to receive a holding nut 22 with which may be'associated alock wash er 23. These two serve with the enlargement 21 to rigidly secure the sleeve 17 in the sleeve or boss 8. i

With this construction it will be evident l construction, operation and many, adv-anthat a drifting drill may be removed from its shell, the feed nut disengaged and the present handle structure applied, thus making the tool available for other purposes. Moreover, when the sleeve 17 is in place on the tool and the handle bars are slidably engaged with the guide flanges a yielding handle is provided, for when forward pressure is exerted against the handle grips the handle frame can move forwardly but this movement is resisted by the spring 20, inasmuch as the plunger head 18 will move forwardly with the handle and thus compress" the spring 20 in the sleeve 17. I 7

From the foregoing, it is thought that the tages of the herein described invention will apparent "to those skilled in the art, without further-description and it will be understood that various changes in the size, shape, prQportion and minor details of construction m y be resorted to without departing from "the spirit or sacrificing any of the advantagesof the invention.

'lV-hat I claim is 1. The combination with a fluid operated tool 'having opposite guides and a longitudi- Iia'lly disposed sleeve between the guides, of

a handle the tool and a frame carrying the handle and having portions slidably mounted-on the guides and in the sleeve.

2. The combination with a fluid operated tool having opposite guides and a longitudin-ally disposed sleevebetween the guides, of

a :handle the tool and a frame carrying the handle and having portions slidably mounted on the guides and in the sleeve, and a spring engaged with one of the portions for resisting the sliding movement in one direction. H

3. The combination with a fluid operated :tool having a barrel, said barrel being provided with guides, and a longitudinal sleeve between the guides, of a handle havlng a frame provided with slidesengaged with the guides, a plunger slidably mounted in the sleeve, and-a springin the sleeve that resists the movement .of the plunger.

, 4. The'combination with a tool barrel having opposite guide flanges and a longitudinally disposed sleeve between the flanges, of a second sleeve fixed in the first sleeve, a handle in the rear ofthe barrel having forwardly extending side arms provided with grooves that slidably receive the guides, a

plunger rod carried by the front ends of the sidearms and slidably engaged in the second sleeve, a plunger head on the rod, and a spring in-theseeond sleeve borne against by :the plunger head.

'5. A handle attachment for drifting drills, comprising a handle grip, aframecar- 'rying said grip and having guideways for receiving the guide flanges of a drifting drill,

a spring mounting for resisting the movement of the handle, carried by said frame, and means for securing said mounting in the feed nut sleeve of the drifting drill.

6. A handle attachment for drifting drills, comprising a handle grip, a frame carrying said grip and having forwardly extending arms provided with guideWa-ys for receiving the guide flanges of a drifting drill,

a plunger rod connected to the front end of the arms and extending rearwardly between the same, a sleeve surrounding the rod and in which. it is slidably engaged, a spring in the sleeve that resists the relative movement of the rod and sleeve, and means for fixing the sleeve in the feed nut sleeve of the drifting drill.

7,. A spring handle for a rock drill, comprising a cradle having guideways to receive the shell guides of a rock drill Whereon said cradle is adapted to slide, means for-connect ing the cradle to the drill, a spring acting against the cradle and the drill to cushion the cradle, and grip members on the cradle for manipulating the rock drill.

8.. A spring handle adapted to be substituted forthe shell of a rock drill, comprising a cradle having internal guideways to cooperate slidably'withthe shell guides of the rock drill, a bolt for holding the cradle on the shell guides, a spring acting against the cradle and 'a rock drill for holding the cradle inretracted position, and grip members on the cradle for manipulating the rock mounted on the guide flanges, and means engaged inthe sleeve for anchoring the handle frame to the cylinder and permitting its slidable movementon the guide flanges.

11. In .a percussive tool, a cylinder having outstandingguide flanges and .a-hollow sleeve member, a handle having a frame slidably mounted on the guide flanges, means engaged in the sleeve for anchoring the handle frame I to the cylinder and permitting its slidablc movement on the guide'flangcs, and a spring engaged with the anchoring meansfor yieldingly resisting the sliding movement of the g I so,

handle frame.

12. In a percussive tool, a cylinderhaving outstanding guideflanges and ahollowsleeve member, a handle having a frame slidably mounted .on the guide fhnges, means ongaged in the sleeve for anchoring-thehandle 7 frame to the cylinder and permitting its slidable movement on the guide flanges, said means including a bolt that passes through the sleeve, and a spring'on the bolt for yieldingly resisting the sliding movement of the handle frame.

13. In a percussive tool having outstanding guide flanges and a hollow boss, a handled frame having guideways that are slidable upon the flanges, a sleeve fixedly mounted in the boss, a bolt engaged with the handled frame and passing through the sleeve, and a spring on the bolt bearing against the sleeve and resisting the sliding movement of the handled frame.

14. A handle attachment for drifting drills comprising a frame shell having internal guideways to receivethe guide flanges of a drill, a handle carried by the frame, a sleeve for engagement in the boss of the drill, a bolt that passes through the sleeve and is engaged with the frame shell, and a spring on the bolt that bears against the sleeve.

15. A handle attachment for drifting drills comprising a frame shell having internal guideways to receive the guide flanges of a drill, a handle carried by the frame, a sleeve for engagement in the boss of the drill, said sleeve having an abutment shoulder for en gagement with one end of the boss and a holding nut threaded on the other end of the sleeve for holding the sleeve in the boss, a bolt that passes through the sleeve and is engaged With the frame shell, and a spring on the bolt that bears against the sleeve.

In testimony whereof, I affix my signature.

AUGUST H. KATTERJOHN. 

